Soft-handle twist drill

Soft-handle twist drill

  • CN 2,540,245 Y
  • Filed: 05/15/2002
  • Issued: 03/19/2003
  • Est. Priority Date: 05/15/2002
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of soft handle twist drill, twist shape drill body and drillstock are fixed with one, and drill body comprises apex point and spiral part, it is characterized in that:

  • the apex point angle is the 85-135 degree, and drillstock hardness is low than drill body, opens a flat grooves that is used for clamping on drillstock.

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